Signum is Latin for "sign" and may refer to:
Brands and companies Integra Signum, a (defunct) Swiss railroad signaling company Integra-Signum, a train protection system Opel Signum, an Opel car model Signum Biosciences, a company based in New Jersey Signum (typeface), a 1955 typeface designed by Georg Trump for the Weber Typefoundry
Media Signum (magazine), a German literary magazine Signum (musical group), a trance music group Signum (Nanoha), a character from the Magical Girl Lyrical Nanoha series Signum Quartet, a string quartet based in Cologne, Germany Signum Records, a classical music record label in the UK
Other uses Signum, part of Roman naming conventions Signum, an alternative name for some Roman Republic army units Signum (anatomy), a part of the female Lepidoptera genitalia Signum function or sign function in mathematics Signum manus, type of signature Signum (blockchain) Signum University, an online educational institution Signum, a battalion of the 93rd Mechanized Brigade (Ukraine)